Green sulfur dye.



- stuff is isolated from its solution by ran snares rar *li FFE SE .i'osnrn nnncnsnennnim new KARL PAUL enemas, or ELBERFELD, AND nan new, or VOHWINKLL, mean nnnnarnm, can-near, assrcnons TO rannnn mnsnmn vomit; FRIEDR. earns a 00., or ELIBERFELD, GERMANY, A neuron-Arron or To all whom it may concern:

Be it known that we, JOSEPH FLAOHSLAEN- mm and KARL PAUL GRL LLERT, residing at' and production of new green sulfur colors which'are obtained by treating with alkali polysulfids the leucoindophenols of the formula:

, K/ iH (in which X means a phenolic radical) or the corresponding indophenols. The melt can also be carried out with the addition of copper or aic'opper compound.

The new dyes areafter being dried and pulverized dark powders soluble in a solution of sodium sulfid generally with a green coloration and soluble with diificulty in concentrated sulfuric acid with a greenish-blue coloration. They dye cotton in green shades distinguished by their fastness to boiling and to light.

v In order to illustrate the new process more fully the following example is given, the parts beingby weight: sodium sulfid per cent. Na s), 50 parts ofsulfur, 36 parts of the leucoindophenol (obtained from the leucoindophenol derived from 1.8-naphthylenediamin and .dichloro-para-aminophenol and treatment with p'hosgen), 5 parts of copper sulfate and 150 parts of alcohol are boiled during 48 hours in a vessel provided with a reflux condenser. The alcohol is then distilled. oii', the residue is dissolved in water and the dyerecipitation with air or acid. The new co oring matter is after being dried and pulverized a dark powder soluble in a sodium sulfid solution with a dark green coloration.

60 parts of calcined.

Patented Dec. 16, 1933.

GERMANY.

' GEEEN SULFUR DYE.

1,1,598 Specification of Letters Patent. 1T0 Drawing;

Apyueauon filled @etober 3, 1&1'2. Serial No. 723 709.

It is soluble with difficulty in concentrated sulfuric acid with a greenish-blue coloration. It dyes cotton in pure green shades fast to light and to boiling. In the same way leucoindophenol bases substituted in the benzene nucleus by other substituents e. 9. methyl, chlorin, etc, or the corresponding indophenols can be used.

The above mentioned quantities of sodium sulfid and of sulfur-as well as the temperature and the duration of the reaction can be Varied within wide limits.

VVe claim 1. The herein described new sulfur dyes being sulfur-containing derivatives of leucoindophenols of the formula:

tion; being with difficulty soluble in concentrated sulfuric acid with a fgreenish-blue coloration; and dyeing unmordanted cotton green shades fast to light and to boiling,

substantially as described.

2. The herein described new sulfur dye being a sulfur-containing derivative of the leucoindophenol of the formula:

NH NH which dye is after being dried and pulver ized a dStIkPO WdGI solnble in a sodium sul- Set our hands in the presence of two suio fid solutlon with a dark green coloration scribing Witnesses.

solublewith difficulty in concentrated sul- JOSEPH FLAGHSLAENDER. [L- s.] furic acid with a greenish-bluecoloration; KARL PAUL GRKLERT. [11.3.] a and dyeing unmordanted cotton in pure MAXIBUFF. v [1). s-]

green she'des fast to light and to boiling, Witnesses: substantlally as described. 1 ALBERT NUFER,

In testimony whereof ehave hereunto GUSTAVO NAVARRETE. 

